How to use Burger King trainer. It’s easy! When you defeat the Burger King event in Career mode, go to the trainer selection screen and press Down until the Burger King appears. Thus you will receive a Heart.
To unlock boxing styles, you have to win the following matches in ESPN Classic Fights mode or Career mode:
Judge Jab
Lethal Uppercuts
Philly Shell
Sinister Cross
Hard Straights
Hook Master
Slickster
Smooth
Textbook
Uptight
How to win in Career mode? It’s easy! Go to the options menu and set “Illegal Blows” to “Off”. After that, when at the fight store, buy the illegal head punch “Elbow Shot”. You have to use it while fighting when your opponent throws a punch. Moreover, use the Elbow Shot as a counter attack.